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    Wyświetlanie 1-12 z 12
    Tytuł:
    Balance of Polarization in a Hybrid Fiber Optic Sensor
    Autorzy:
    Życzkowski, M.
    Szustakowski, M.
    Markowski, P.
    Karol, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399415.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.81.Pa
    42.30.Wb
    42.79.Qx
    Opis:
    This paper presents the effect of light polarization in a hybrid fiber optic sensor. The hybrid sensor is defined as a combination of interferometer sensor and modalmetric sensor. Hybrid sensor system is based on the effect of outputting interferometric sensor of interference as a result of changes made by the modalmetric system. Balance of polarization in the arms of classical interferometer sensor leads to improvement of contrast of interference pattern at the output of the interferometer. Aim of this study is to present a balance light polarization effects in a hybrid system.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 610-612
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multispectral Systems of Imaging Scenery in Critical Infrastructure Protection, Threat Identification and Recognition
    Autorzy:
    Karol, M.
    Szustakowski, M.
    Życzkowski, M.
    Markowski, P.
    Ciurapiński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399365.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Wb
    87.57.-s
    42.79.Qx
    Opis:
    The surveillance system more often uses devices working on different bands that are used not only for detection but also to recognize and identify threats. The paper presents the possibility of protection, detection and identification of risks, achieved through the use of multispectral detection systems in critical infrastructure facilities. The authors consider the benefits of active sensors based on other wavebands, such as millimeter wave radar, terahertz cameras, infrared camera and shows the ability to detect and identify the target using data collected by the sensors. Also discussed the issue of fusion data from different sensors and opportunities that the whole system obtained by application of data fusion.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 459-462
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Methods of Information Extraction from OCT Images
    Autorzy:
    Zajac, A.
    Urbański, Ł.
    Kasprzak, J.
    Kecik, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493300.pdf
    Data publikacji:
    2011-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.57.-s
    42.79.Qx
    42.30.Wb
    Opis:
    Optical diagnostic methods of biological media are more and more willingly used in clinical practice - also instead of classical biopsy. Particularly, optical coherent tomography methods and mammography (permitting achieving three-dimensional imaging of a tissue) are attractive in comparison with classical diagnostic methods. The article presents the analysis methods of optical parameters of biological tissues developed allowing obtaining absolute values of these parameters. Thanks to modern image analysis methods - wavelet transforms - the optical diagnostic effectiveness was improved. The theoretical and practical results achieved were compared with results of commercially accessible methods implemented in OCT devices.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 4; 772-775
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical Properties of Fiber-Optic Sensor in New Dual Configuration
    Autorzy:
    Życzkowski, M.
    Szustakowski, M.
    Markowski, P.
    Karol, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418076.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Wb
    87.57.-s
    42.79.Qx
    Opis:
    The main aim of the work is the integration of two different fiber-optic sensors: the Michelson interferometric sensor, the Mach-Zehnder interferometric, the Sagnac interferometric and modalmetric sensors. The proposed hybrid sensor is a classical interferometer whose measuring arm is upgraded with modalmetric sensor. The theme of research is to assess the impact of modalmetric sensor to interferometer and comparative assessment of detection capabilities of interferometric sensor, modalmetric sensor and hybrid sensor for different types of excitations. The described tests concern the area of basic researches. The results can be used in the construction sensors with corresponding characteristics and properties to the appropriate applications.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 938-941
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research and Parameter Optimization of the Infrared Sensor for Eye Track
    Autorzy:
    Życzkowski, M.
    Szustakowski, M.
    Różanowski, K.
    Murawski, K.
    Karol, M.
    Markowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418088.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Wb
    87.57.-s
    42.79.Qx
    Opis:
    This paper presents infrared sensor for eye tracking system for ophthalmology and truck drivers. System is based on camera and near infrared diode illuminator. We present test results of sensor detection at different operating parameters. Tests were chosen so as to see how the sensor behaves in difficult conditions, additionally tested whether long-term operation of the sensor has an impact on the examined person.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 942-945
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive Modulation Amplitude in 2D Spectral-Spatial EPR Imaging
    Autorzy:
    Czechowski, T.
    Samolej, A.
    Baranowski, M.
    Boś-Liedke, A.
    Chlewicki, W.
    Jurga, J.
    Tadyszak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030422.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.30.-v
    42.30.Wb
    75.20.-g
    42.30.Va
    Opis:
    A study concerning the image quality in Electron Paramagnetic Resonance Imaging (EPRI) in 2D spectral-spatial (2D SSI) experiments is presented. The aim of the measurements is to improve the signal to noise ratio (SNR) of the projections by applying a more consciously selected modulation amplitude parameter. Data is gathered by applying three constant and one adaptive modulation amplitude. The three fixed modulation amplitudes values are leading to undermodulated (0.01 G), partially overmodulated (0.15 G) and fully overmodulated (0.65 G) projections. The study demonstrates the advantages of the adaptive method, which involves selecting different and dependent on cosine function modulation amplitudes for each projection. The study is performed on a phantom containing four tubes of LiPc and TCNQ, characterized by a different peak to peak linewidth and spin concentration.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 710-712
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Improved Method of Linear Travel-Time Interpolation Ray Tracing Algorithm
    Autorzy:
    Hao-Quan, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1535590.pdf
    Data publikacji:
    2010-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.05.Pj
    42.30.Wb
    43.60.+d
    Opis:
    The linear travel-time interpolation algorithm is improved by the method of ray tracing based on finite difference scheme of eikonal equation. It can simulate the more complex medium. Using the algorithm to calculate travel-time and paths of tracing rays, it is more rapid and accurate than the other conventional methods. The linear travel-time interpolation ray tracing algorithm has a drawback: rays cannot go round the low velocity area if the launching point, the receiving point and the low velocity area distribute on the same column (row). Aiming at the drawback, an improved algorithm is proposed on the basis of researching reconstruction theories. The given algorithm adopts a cross-scanning strategy to carry out forward processing and uses discrete points as the secondary sources to simplify backward processing. The numerical simulation experiments show that the rays can go round the low velocity areas located in the same column (row) of the launching points and the receiving points. Rays scan over the global region only once.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 4; 521-526
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Diagnostic in Medicine - Needs and Possibilities
    Autorzy:
    Kasprzak, J.
    Samsel, D.
    Borkowska, A.
    Kecik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493247.pdf
    Data publikacji:
    2011-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Wb
    87.57.-s
    42.79.-e
    42.79.Qx
    Opis:
    Methods of optical imaging used in medical diagnostic (with taking the newest diagnostic techniques into consideration in particular) have been presented. Selected optical characteristics of tissues having an influence on the range of the classical methods of the optical imaging have been discussed in detail. The respond to the classical method limitations was to use scanning methods and detection techniques consisting in three-dimensional imaging of tissue structures in real time. A specific eye structure allows the wide using of these techniques in ophthalmology. Such advantages like non-invasiveness, non-contactness and high resolution (guaranteeing the safety of a patient) show a huge success of these techniques. The results of the research (conducted in many research centers) point at the wider application possibility of optical scanning method in medical diagnostic.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 4; 678-685
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Characterization of Defects in Multi-Layered Composite Materials by Thermal Tomography Methods
    Autorzy:
    Swiderski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1808057.pdf
    Data publikacji:
    2009-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.57.-c
    07.05.Pj
    42.30.-d
    42.30.Wb
    42.72.Ai
    Opis:
    The idea of thermal tomography is slicing a work piece for some in-depth layers which exhibit the distribution of thermal properties in materials by the analogy with X-ray tomography. Thermal tomography is based on the analysis of the surface temperature evolution which follows thermal stimulation of test samples. In this paper, some experimental results of applying the dynamic thermal tomography algorithm to a carbon fibre reinforced plastic sample are presented. The efficiency of few data processing methods is discussed.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 4; 800-804
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Frequency Domain Optical Coherence Tomography Techniques in Eye Imaging
    Autorzy:
    Wojtkowski, M.
    Kowalczyk, A.
    Targowski, P.
    Gorczyńska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035626.pdf
    Data publikacji:
    2002-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.30.Wb
    42.66.Ew
    42.66.-p
    07.60.-j
    07.60.Ly
    Opis:
    This contribution presents an application of frequency-domain optical tomography to ophthalmology. Essential theoretical foundations of time-domain and frequency-domain optical tomography are presented. Images of sections through the anterior chamber, the corneo-scleral angle and fundus of the eye are reconstructed from the spectral fringes. The morphological information gained by tomograms is important for diagnosing and planning of a treatment of glaucoma.
    Źródło:
    Acta Physica Polonica A; 2002, 102, 6; 739-746
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Measurement Possibility Analysis of the Real Values of the Tissue Structure Parameters with the Use of Optical Coherent Tomography Method
    Autorzy:
    Kasprzak, J.
    Kęcik, D.
    Zajac, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1493240.pdf
    Data publikacji:
    2011-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    06.20.-f
    42.79.-e
    42.79.Ls
    42.30.Wb
    87.19.rm
    Opis:
    The issues connected with the usefulness of the method of averaging A-scans applied in measurements of real optical parameters with the use of commercial optical coherent tomography systems have been discussed. The basic method description and examples of applications have been given. Examples of the characteristics of metrological devices used in medical practice as well as the possibility of the method applied to the turbidity assessment have been presented.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 4; 662-665
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of Graphics Processing Unit for In-Line Electron Holography
    Autorzy:
    Morawiec, K.
    Dłużewski, P.
    Kret, S.
    Szczepańska, A.
    Li, T.
    Sloan, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033020.pdf
    Data publikacji:
    2017-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.37.Lp
    68.37.Og
    68.55.Nq
    42.30.Rx
    61.05.jp
    07.05.Pj
    42.30.-d
    42.30.Wb
    Opis:
    In the present work, software for exit electron wave reconstruction based on the iterative approach was implemented and a new method for drift-correction of the focal series was proposed.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 5; 1353-1356
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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